Automatic heat-regulator for incubators



2 Sheets-Sheet 1.

(No Model.)

E. W. ANDREWS.

AUTOMATIC HEAT REGULATOR FOR INGUBATORS.

Patented Dec. 29, 1885.

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AUTOMATIC HEAT REGULATOR FOR I-NGUBATOBS.

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EDWIN W. ANDREWVS, OF ELMIRA, NEWV YORK.

AUTOMATIC HEAT- REGULATOR FOR INCUBATORS.

' SPECIFICATION forming part of Letters Patent No. 333,097, dated December 29, 1885.

Application filed June 26,1885. Serial No. 169,915 (No model.)

T all whom it may concern:

Be it known that I, EDWIN W. ANDREWS, of

Elmira, in the county of Ohemung, in the Stateof New York, have invented newand. useful Improvements in Automatic Heat-Regulators for Incubators, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention consists in novel devices for IO regulating the flame of the lamp which supplies the heat of the incubating-chamber, and in simultaneously adjusting the ventilatingvalve of the incubating-chamber, allas hereinafter more fully explained, and specifically I 5- set forth in the claims.

In the accompanying drawings, Figure I is a perspective view of the incubating-chamber with its front doors removed, to illustrate the internal arrangement thereof. Fig. II is a vertical longitudinal section of the same.

Fig. III is an enlarged detail view of the ventilator-valve and its actuating mechanism, and Fig. IV is an enlarged detail view of the flame and its connection with the thermostatic bar. The same letters of reference indicate the same or corresponding parts.

A denotes the incubating-cha n1ber. B B are the two heating-chambers extended horizontally across the interior of the chamber A, and arranged one above the other, to form between them the egg-chamber O. The lower of the heating-chambers is sufficiently above the bottom of the chamber A to form an air-space between them, and suitable ducts, 3 5 ff, are provided in the bottom of the chamber A for the admission of air. The chambers B B are connected at one end by the flue a, and at the opposite end the upper chamber is provided with an exit-pipe, c, and the lower chamber communicates with the heater, which consists of the lamp L, (illustrated in detail in Fig. IV of the drawings,) the chimney of said lamp being extended into the chamber B to conduct the heat to the same. Through the 5 upper chamber, B, is extended aventilatingture thereof and become expanded and contracted by the changes of said temperature,

said bar being connected with the burner of the lamp and with the ventilator-valve in various ways, to automatically control the same.

It is the peculiar means for producing this last mentioned effect which constitutes part of my present invent-ion.

To the burner of the lamp L, I connecta flame-checker, consisting of a cranked rod h, pivoted at the side of the wick-tube, and having attached to it a plate, h, which by the turning of said rod is carried over the top of the wick-tube, so as to check the flame.

On the side of the incubating-chamber A is pivoted a vertical lever, l, which below its pivot is connected with the thermostatic bar K, and the lower extremity of said lever is connected with the cranked arm of the rod h by an arm, Z, as best seen in Fig. IV of the drawings. The ventilator-valve D is pivoted and balanced, and to the shaft of said valve is attached a pinion, m. Beneath the pinion is a pivoted arm, n, which is provided at its upper end with a segmental rack, a, engaging the pinion m. A rod, 0, is connected at one end with the arm n, below the pivot thereof, and the opposite end of said rod is connected with the upper end of the lever Z. In case the heat in the incubating chamber rises above the requisite temperature, the thermostatic bar K expands sufficiently to push the lower end of the lever outward from the side of the chamber A, and thus causes the said portion of the lever to turn the cranked rod h so as to throw the plate h across the top of the wicktube, and thereby check the flame. Simultaneously with this operation the upper end of the lever is swung toward the chamber A,

degree, the thermostatic bar has contracted sufflciently to produce a reverse action of the flame-checker and ventilator-valve, and thus prevents further reduction of the temperature in the incubating-chamber.

ICO

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In combination with the incubating-chamher A, thermostatic bar K, and pivoted lever Z, the ventilator valve D, pivoted and balanced, the pinion m, attached to the valve shaft, the pivoted arm n, provided with the segmental rack 12, and the rod 0, connecting the arm n with the lever Z, substantially in the manner described and shown.

2. In combination with theincubatingchamher A, heating chambers B B, thermostatic bar K, and lamp L, the cranked rod h, flamechecker h, attached to said rod, the lever Z, the arm Z, connecting said lever with the rod h, the ventilator-valve D, pivoted and balanced, the pinion m, attached to the valveshaft, the pivoted arm it, provided with segmental rack n, and the rod 0, connecting the arm n with the lever Z, all constructed and combined to automatically and simultaneously regulate the supply of heat to and escape of heat from the incubating-chamber, substantially as described and shown. In testimony whereof I have hereunto signed my name and affixed my seal, in the presence of two attesting witnesses, at Elmira, in the county of Ghemung, in the State of New York, this 17th day of June, 1885.

EDWIN W. ANDREWS. [L s] \Vitnesses:

JOHN H. ANDREws, H. V. RANSOM. 

